Research Article

Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes

Volume: 39 Number: 1 February 3, 2026
TR EN

Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes

Abstract

Due to the high heat losses in the buildings, using thermal insulation for external walls is a very effective method to decrease the building energy demand and their influences on environment. The goal of this work is to determine optimal exterior sheathing thickness to make energy consumption in the buildings more efficient. The P1-P2 method combined with the degree day method is used to predict the optimum sheathing thickness for the United States test cities. The rockwool and insulating board are considered for the insulation materials. The sheathing thickness must be chosen near the optimum point to augment energy savings in the buildings. It is seen that the rockwool material having low thermal conductivity leads to a reduction in the payback period and insulation thickness with high net savings. The optimal insulation thicknesses of 0.064 m and 0.12 m with the payback period of 4.4 and 5.9 years were determined for the rockwool and insulating board, respectively, in New York City.

Keywords

References

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Details

Primary Language

English

Subjects

Optimization Techniques in Mechanical Engineering

Journal Section

Research Article

Early Pub Date

February 3, 2026

Publication Date

February 3, 2026

Submission Date

May 15, 2025

Acceptance Date

January 21, 2026

Published in Issue

Year 2026 Volume: 39 Number: 1

APA
Cengiz, A. Ş., Kaplan, M., & Söylemez, M. S. (2026). Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes. Gazi University Journal of Science, 39(1), 565-576. https://doi.org/10.35378/gujs.1700432
AMA
1.Cengiz AŞ, Kaplan M, Söylemez MS. Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes. Gazi University Journal of Science. 2026;39(1):565-576. doi:10.35378/gujs.1700432
Chicago
Cengiz, Ali Şeref, Mahmut Kaplan, and M. Sait Söylemez. 2026. “Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes”. Gazi University Journal of Science 39 (1): 565-76. https://doi.org/10.35378/gujs.1700432.
EndNote
Cengiz AŞ, Kaplan M, Söylemez MS (March 1, 2026) Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes. Gazi University Journal of Science 39 1 565–576.
IEEE
[1]A. Ş. Cengiz, M. Kaplan, and M. S. Söylemez, “Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes”, Gazi University Journal of Science, vol. 39, no. 1, pp. 565–576, Mar. 2026, doi: 10.35378/gujs.1700432.
ISNAD
Cengiz, Ali Şeref - Kaplan, Mahmut - Söylemez, M. Sait. “Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes”. Gazi University Journal of Science 39/1 (March 1, 2026): 565-576. https://doi.org/10.35378/gujs.1700432.
JAMA
1.Cengiz AŞ, Kaplan M, Söylemez MS. Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes. Gazi University Journal of Science. 2026;39:565–576.
MLA
Cengiz, Ali Şeref, et al. “Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes”. Gazi University Journal of Science, vol. 39, no. 1, Mar. 2026, pp. 565-76, doi:10.35378/gujs.1700432.
Vancouver
1.Ali Şeref Cengiz, Mahmut Kaplan, M. Sait Söylemez. Optimum Thickness of Outside Sheathing Insulation for Exterior Walls of Building Envelopes. Gazi University Journal of Science. 2026 Mar. 1;39(1):565-76. doi:10.35378/gujs.1700432